Merge branch 'tipc_net-next' of git://git.kernel.org/pub/scm/linux/kernel/git/paulg/linux
This commit is contained in:
David S. Miller
Коммит
17b8a74f00
330
net/tipc/bcast.c
330
net/tipc/bcast.c
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|
@ -157,39 +157,14 @@ u32 tipc_bclink_get_last_sent(void)
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return bcl->fsm_msg_cnt;
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}
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/**
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* bclink_set_gap - set gap according to contents of current deferred pkt queue
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*
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* Called with 'node' locked, bc_lock unlocked
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*/
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static void bclink_set_gap(struct tipc_node *n_ptr)
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static void bclink_update_last_sent(struct tipc_node *node, u32 seqno)
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{
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struct sk_buff *buf = n_ptr->bclink.deferred_head;
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n_ptr->bclink.gap_after = n_ptr->bclink.gap_to =
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mod(n_ptr->bclink.last_in);
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if (unlikely(buf != NULL))
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n_ptr->bclink.gap_to = mod(buf_seqno(buf) - 1);
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}
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/**
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* bclink_ack_allowed - test if ACK or NACK message can be sent at this moment
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*
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* This mechanism endeavours to prevent all nodes in network from trying
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* to ACK or NACK at the same time.
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*
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* Note: TIPC uses a different trigger to distribute ACKs than it does to
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* distribute NACKs, but tries to use the same spacing (divide by 16).
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*/
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static int bclink_ack_allowed(u32 n)
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{
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return (n % TIPC_MIN_LINK_WIN) == tipc_own_tag;
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node->bclink.last_sent = less_eq(node->bclink.last_sent, seqno) ?
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seqno : node->bclink.last_sent;
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}
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/**
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/*
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* tipc_bclink_retransmit_to - get most recent node to request retransmission
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*
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* Called with bc_lock locked
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@ -300,140 +275,94 @@ exit:
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spin_unlock_bh(&bc_lock);
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}
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/**
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* bclink_send_ack - unicast an ACK msg
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/*
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* tipc_bclink_update_link_state - update broadcast link state
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*
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* tipc_net_lock and node lock set
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*/
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static void bclink_send_ack(struct tipc_node *n_ptr)
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{
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struct tipc_link *l_ptr = n_ptr->active_links[n_ptr->addr & 1];
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if (l_ptr != NULL)
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tipc_link_send_proto_msg(l_ptr, STATE_MSG, 0, 0, 0, 0, 0);
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}
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/**
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* bclink_send_nack- broadcast a NACK msg
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*
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* tipc_net_lock and node lock set
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*/
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static void bclink_send_nack(struct tipc_node *n_ptr)
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void tipc_bclink_update_link_state(struct tipc_node *n_ptr, u32 last_sent)
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{
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struct sk_buff *buf;
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struct tipc_msg *msg;
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if (!less(n_ptr->bclink.gap_after, n_ptr->bclink.gap_to))
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/* Ignore "stale" link state info */
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if (less_eq(last_sent, n_ptr->bclink.last_in))
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return;
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/* Update link synchronization state; quit if in sync */
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bclink_update_last_sent(n_ptr, last_sent);
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if (n_ptr->bclink.last_sent == n_ptr->bclink.last_in)
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return;
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/* Update out-of-sync state; quit if loss is still unconfirmed */
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if ((++n_ptr->bclink.oos_state) == 1) {
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if (n_ptr->bclink.deferred_size < (TIPC_MIN_LINK_WIN / 2))
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return;
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n_ptr->bclink.oos_state++;
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}
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/* Don't NACK if one has been recently sent (or seen) */
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if (n_ptr->bclink.oos_state & 0x1)
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return;
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/* Send NACK */
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buf = tipc_buf_acquire(INT_H_SIZE);
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if (buf) {
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msg = buf_msg(buf);
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struct tipc_msg *msg = buf_msg(buf);
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tipc_msg_init(msg, BCAST_PROTOCOL, STATE_MSG,
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INT_H_SIZE, n_ptr->addr);
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INT_H_SIZE, n_ptr->addr);
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msg_set_non_seq(msg, 1);
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msg_set_mc_netid(msg, tipc_net_id);
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msg_set_bcast_ack(msg, mod(n_ptr->bclink.last_in));
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msg_set_bcgap_after(msg, n_ptr->bclink.gap_after);
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msg_set_bcgap_to(msg, n_ptr->bclink.gap_to);
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msg_set_bcast_tag(msg, tipc_own_tag);
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msg_set_bcast_ack(msg, n_ptr->bclink.last_in);
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msg_set_bcgap_after(msg, n_ptr->bclink.last_in);
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msg_set_bcgap_to(msg, n_ptr->bclink.deferred_head
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? buf_seqno(n_ptr->bclink.deferred_head) - 1
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: n_ptr->bclink.last_sent);
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spin_lock_bh(&bc_lock);
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tipc_bearer_send(&bcbearer->bearer, buf, NULL);
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bcl->stats.sent_nacks++;
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spin_unlock_bh(&bc_lock);
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buf_discard(buf);
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/*
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* Ensure we doesn't send another NACK msg to the node
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* until 16 more deferred messages arrive from it
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* (i.e. helps prevent all nodes from NACK'ing at same time)
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*/
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n_ptr->bclink.nack_sync = tipc_own_tag;
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n_ptr->bclink.oos_state++;
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}
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}
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/**
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* tipc_bclink_check_gap - send a NACK if a sequence gap exists
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/*
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* bclink_peek_nack - monitor retransmission requests sent by other nodes
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*
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* tipc_net_lock and node lock set
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*/
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void tipc_bclink_check_gap(struct tipc_node *n_ptr, u32 last_sent)
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{
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if (!n_ptr->bclink.supported ||
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less_eq(last_sent, mod(n_ptr->bclink.last_in)))
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return;
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bclink_set_gap(n_ptr);
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if (n_ptr->bclink.gap_after == n_ptr->bclink.gap_to)
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n_ptr->bclink.gap_to = last_sent;
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bclink_send_nack(n_ptr);
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}
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/**
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* tipc_bclink_peek_nack - process a NACK msg meant for another node
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* Delay any upcoming NACK by this node if another node has already
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* requested the first message this node is going to ask for.
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*
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* Only tipc_net_lock set.
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*/
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static void tipc_bclink_peek_nack(u32 dest, u32 sender_tag, u32 gap_after, u32 gap_to)
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static void bclink_peek_nack(struct tipc_msg *msg)
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{
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struct tipc_node *n_ptr = tipc_node_find(dest);
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u32 my_after, my_to;
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struct tipc_node *n_ptr = tipc_node_find(msg_destnode(msg));
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if (unlikely(!n_ptr || !tipc_node_is_up(n_ptr)))
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if (unlikely(!n_ptr))
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return;
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tipc_node_lock(n_ptr);
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/*
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* Modify gap to suppress unnecessary NACKs from this node
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*/
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my_after = n_ptr->bclink.gap_after;
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my_to = n_ptr->bclink.gap_to;
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if (less_eq(gap_after, my_after)) {
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if (less(my_after, gap_to) && less(gap_to, my_to))
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n_ptr->bclink.gap_after = gap_to;
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else if (less_eq(my_to, gap_to))
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n_ptr->bclink.gap_to = n_ptr->bclink.gap_after;
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} else if (less_eq(gap_after, my_to)) {
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if (less_eq(my_to, gap_to))
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n_ptr->bclink.gap_to = gap_after;
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} else {
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/*
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* Expand gap if missing bufs not in deferred queue:
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*/
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struct sk_buff *buf = n_ptr->bclink.deferred_head;
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u32 prev = n_ptr->bclink.gap_to;
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if (n_ptr->bclink.supported &&
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(n_ptr->bclink.last_in != n_ptr->bclink.last_sent) &&
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(n_ptr->bclink.last_in == msg_bcgap_after(msg)))
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n_ptr->bclink.oos_state = 2;
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for (; buf; buf = buf->next) {
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u32 seqno = buf_seqno(buf);
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if (mod(seqno - prev) != 1) {
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buf = NULL;
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break;
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}
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if (seqno == gap_after)
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break;
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prev = seqno;
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}
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if (buf == NULL)
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n_ptr->bclink.gap_to = gap_after;
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}
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/*
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* Some nodes may send a complementary NACK now:
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*/
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if (bclink_ack_allowed(sender_tag + 1)) {
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if (n_ptr->bclink.gap_to != n_ptr->bclink.gap_after) {
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bclink_send_nack(n_ptr);
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bclink_set_gap(n_ptr);
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}
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}
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tipc_node_unlock(n_ptr);
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}
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/**
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/*
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* tipc_bclink_send_msg - broadcast a packet to all nodes in cluster
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*/
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@ -460,7 +389,33 @@ exit:
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return res;
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}
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/**
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/*
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* bclink_accept_pkt - accept an incoming, in-sequence broadcast packet
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*
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* Called with both sending node's lock and bc_lock taken.
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*/
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||||
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static void bclink_accept_pkt(struct tipc_node *node, u32 seqno)
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{
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bclink_update_last_sent(node, seqno);
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node->bclink.last_in = seqno;
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node->bclink.oos_state = 0;
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bcl->stats.recv_info++;
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||||
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/*
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||||
* Unicast an ACK periodically, ensuring that
|
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* all nodes in the cluster don't ACK at the same time
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||||
*/
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if (((seqno - tipc_own_addr) % TIPC_MIN_LINK_WIN) == 0) {
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||||
tipc_link_send_proto_msg(
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||||
node->active_links[node->addr & 1],
|
||||
STATE_MSG, 0, 0, 0, 0, 0);
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||||
bcl->stats.sent_acks++;
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||||
}
|
||||
}
|
||||
|
||||
/*
|
||||
* tipc_bclink_recv_pkt - receive a broadcast packet, and deliver upwards
|
||||
*
|
||||
* tipc_net_lock is read_locked, no other locks set
|
||||
|
|
@ -472,7 +427,7 @@ void tipc_bclink_recv_pkt(struct sk_buff *buf)
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|||
struct tipc_node *node;
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||||
u32 next_in;
|
||||
u32 seqno;
|
||||
struct sk_buff *deferred;
|
||||
int deferred;
|
||||
|
||||
/* Screen out unwanted broadcast messages */
|
||||
|
||||
|
|
@ -487,6 +442,8 @@ void tipc_bclink_recv_pkt(struct sk_buff *buf)
|
|||
if (unlikely(!node->bclink.supported))
|
||||
goto unlock;
|
||||
|
||||
/* Handle broadcast protocol message */
|
||||
|
||||
if (unlikely(msg_user(msg) == BCAST_PROTOCOL)) {
|
||||
if (msg_type(msg) != STATE_MSG)
|
||||
goto unlock;
|
||||
|
|
@ -501,85 +458,114 @@ void tipc_bclink_recv_pkt(struct sk_buff *buf)
|
|||
spin_unlock_bh(&bc_lock);
|
||||
} else {
|
||||
tipc_node_unlock(node);
|
||||
tipc_bclink_peek_nack(msg_destnode(msg),
|
||||
msg_bcast_tag(msg),
|
||||
msg_bcgap_after(msg),
|
||||
msg_bcgap_to(msg));
|
||||
bclink_peek_nack(msg);
|
||||
}
|
||||
goto exit;
|
||||
}
|
||||
|
||||
/* Handle in-sequence broadcast message */
|
||||
|
||||
receive:
|
||||
next_in = mod(node->bclink.last_in + 1);
|
||||
seqno = msg_seqno(msg);
|
||||
next_in = mod(node->bclink.last_in + 1);
|
||||
|
||||
if (likely(seqno == next_in)) {
|
||||
bcl->stats.recv_info++;
|
||||
node->bclink.last_in++;
|
||||
bclink_set_gap(node);
|
||||
if (unlikely(bclink_ack_allowed(seqno))) {
|
||||
bclink_send_ack(node);
|
||||
bcl->stats.sent_acks++;
|
||||
}
|
||||
receive:
|
||||
/* Deliver message to destination */
|
||||
|
||||
if (likely(msg_isdata(msg))) {
|
||||
spin_lock_bh(&bc_lock);
|
||||
bclink_accept_pkt(node, seqno);
|
||||
spin_unlock_bh(&bc_lock);
|
||||
tipc_node_unlock(node);
|
||||
if (likely(msg_mcast(msg)))
|
||||
tipc_port_recv_mcast(buf, NULL);
|
||||
else
|
||||
buf_discard(buf);
|
||||
} else if (msg_user(msg) == MSG_BUNDLER) {
|
||||
spin_lock_bh(&bc_lock);
|
||||
bclink_accept_pkt(node, seqno);
|
||||
bcl->stats.recv_bundles++;
|
||||
bcl->stats.recv_bundled += msg_msgcnt(msg);
|
||||
spin_unlock_bh(&bc_lock);
|
||||
tipc_node_unlock(node);
|
||||
tipc_link_recv_bundle(buf);
|
||||
} else if (msg_user(msg) == MSG_FRAGMENTER) {
|
||||
int ret = tipc_link_recv_fragment(&node->bclink.defragm,
|
||||
&buf, &msg);
|
||||
if (ret < 0)
|
||||
goto unlock;
|
||||
spin_lock_bh(&bc_lock);
|
||||
bclink_accept_pkt(node, seqno);
|
||||
bcl->stats.recv_fragments++;
|
||||
if (tipc_link_recv_fragment(&node->bclink.defragm,
|
||||
&buf, &msg))
|
||||
if (ret > 0)
|
||||
bcl->stats.recv_fragmented++;
|
||||
spin_unlock_bh(&bc_lock);
|
||||
tipc_node_unlock(node);
|
||||
tipc_net_route_msg(buf);
|
||||
} else if (msg_user(msg) == NAME_DISTRIBUTOR) {
|
||||
spin_lock_bh(&bc_lock);
|
||||
bclink_accept_pkt(node, seqno);
|
||||
spin_unlock_bh(&bc_lock);
|
||||
tipc_node_unlock(node);
|
||||
tipc_named_recv(buf);
|
||||
} else {
|
||||
spin_lock_bh(&bc_lock);
|
||||
bclink_accept_pkt(node, seqno);
|
||||
spin_unlock_bh(&bc_lock);
|
||||
tipc_node_unlock(node);
|
||||
buf_discard(buf);
|
||||
}
|
||||
buf = NULL;
|
||||
tipc_node_lock(node);
|
||||
deferred = node->bclink.deferred_head;
|
||||
if (deferred && (buf_seqno(deferred) == mod(next_in + 1))) {
|
||||
buf = deferred;
|
||||
msg = buf_msg(buf);
|
||||
node->bclink.deferred_head = deferred->next;
|
||||
goto receive;
|
||||
}
|
||||
} else if (less(next_in, seqno)) {
|
||||
u32 gap_after = node->bclink.gap_after;
|
||||
u32 gap_to = node->bclink.gap_to;
|
||||
|
||||
if (tipc_link_defer_pkt(&node->bclink.deferred_head,
|
||||
&node->bclink.deferred_tail,
|
||||
buf)) {
|
||||
node->bclink.nack_sync++;
|
||||
bcl->stats.deferred_recv++;
|
||||
if (seqno == mod(gap_after + 1))
|
||||
node->bclink.gap_after = seqno;
|
||||
else if (less(gap_after, seqno) && less(seqno, gap_to))
|
||||
node->bclink.gap_to = seqno;
|
||||
/* Determine new synchronization state */
|
||||
|
||||
tipc_node_lock(node);
|
||||
if (unlikely(!tipc_node_is_up(node)))
|
||||
goto unlock;
|
||||
|
||||
if (node->bclink.last_in == node->bclink.last_sent)
|
||||
goto unlock;
|
||||
|
||||
if (!node->bclink.deferred_head) {
|
||||
node->bclink.oos_state = 1;
|
||||
goto unlock;
|
||||
}
|
||||
buf = NULL;
|
||||
if (bclink_ack_allowed(node->bclink.nack_sync)) {
|
||||
if (gap_to != gap_after)
|
||||
bclink_send_nack(node);
|
||||
bclink_set_gap(node);
|
||||
}
|
||||
} else {
|
||||
bcl->stats.duplicates++;
|
||||
|
||||
msg = buf_msg(node->bclink.deferred_head);
|
||||
seqno = msg_seqno(msg);
|
||||
next_in = mod(next_in + 1);
|
||||
if (seqno != next_in)
|
||||
goto unlock;
|
||||
|
||||
/* Take in-sequence message from deferred queue & deliver it */
|
||||
|
||||
buf = node->bclink.deferred_head;
|
||||
node->bclink.deferred_head = buf->next;
|
||||
node->bclink.deferred_size--;
|
||||
goto receive;
|
||||
}
|
||||
|
||||
/* Handle out-of-sequence broadcast message */
|
||||
|
||||
if (less(next_in, seqno)) {
|
||||
deferred = tipc_link_defer_pkt(&node->bclink.deferred_head,
|
||||
&node->bclink.deferred_tail,
|
||||
buf);
|
||||
node->bclink.deferred_size += deferred;
|
||||
bclink_update_last_sent(node, seqno);
|
||||
buf = NULL;
|
||||
} else
|
||||
deferred = 0;
|
||||
|
||||
spin_lock_bh(&bc_lock);
|
||||
|
||||
if (deferred)
|
||||
bcl->stats.deferred_recv++;
|
||||
else
|
||||
bcl->stats.duplicates++;
|
||||
|
||||
spin_unlock_bh(&bc_lock);
|
||||
|
||||
unlock:
|
||||
tipc_node_unlock(node);
|
||||
exit:
|
||||
|
|
|
|||
|
|
@ -96,7 +96,7 @@ int tipc_bclink_send_msg(struct sk_buff *buf);
|
|||
void tipc_bclink_recv_pkt(struct sk_buff *buf);
|
||||
u32 tipc_bclink_get_last_sent(void);
|
||||
u32 tipc_bclink_acks_missing(struct tipc_node *n_ptr);
|
||||
void tipc_bclink_check_gap(struct tipc_node *n_ptr, u32 seqno);
|
||||
void tipc_bclink_update_link_state(struct tipc_node *n_ptr, u32 last_sent);
|
||||
int tipc_bclink_stats(char *stats_buf, const u32 buf_size);
|
||||
int tipc_bclink_reset_stats(void);
|
||||
int tipc_bclink_set_queue_limits(u32 limit);
|
||||
|
|
|
|||
148
net/tipc/link.c
148
net/tipc/link.c
|
|
@ -1501,13 +1501,13 @@ static void link_retransmit_failure(struct tipc_link *l_ptr,
|
|||
tipc_node_lock(n_ptr);
|
||||
|
||||
tipc_addr_string_fill(addr_string, n_ptr->addr);
|
||||
info("Multicast link info for %s\n", addr_string);
|
||||
info("Broadcast link info for %s\n", addr_string);
|
||||
info("Supportable: %d, ", n_ptr->bclink.supportable);
|
||||
info("Supported: %d, ", n_ptr->bclink.supported);
|
||||
info("Acked: %u\n", n_ptr->bclink.acked);
|
||||
info("Last in: %u, ", n_ptr->bclink.last_in);
|
||||
info("Gap after: %u, ", n_ptr->bclink.gap_after);
|
||||
info("Gap to: %u\n", n_ptr->bclink.gap_to);
|
||||
info("Nack sync: %u\n\n", n_ptr->bclink.nack_sync);
|
||||
info("Oos state: %u, ", n_ptr->bclink.oos_state);
|
||||
info("Last sent: %u\n", n_ptr->bclink.last_sent);
|
||||
|
||||
tipc_k_signal((Handler)link_reset_all, (unsigned long)n_ptr->addr);
|
||||
|
||||
|
|
@ -1736,7 +1736,7 @@ void tipc_recv_msg(struct sk_buff *head, struct tipc_bearer *b_ptr)
|
|||
|
||||
/* Release acked messages */
|
||||
|
||||
if (tipc_node_is_up(n_ptr) && n_ptr->bclink.supported)
|
||||
if (n_ptr->bclink.supported)
|
||||
tipc_bclink_acknowledge(n_ptr, msg_bcast_ack(msg));
|
||||
|
||||
crs = l_ptr->first_out;
|
||||
|
|
@ -1774,6 +1774,7 @@ protocol_check:
|
|||
head = link_insert_deferred_queue(l_ptr,
|
||||
head);
|
||||
if (likely(msg_is_dest(msg, tipc_own_addr))) {
|
||||
int ret;
|
||||
deliver:
|
||||
if (likely(msg_isdata(msg))) {
|
||||
tipc_node_unlock(n_ptr);
|
||||
|
|
@ -1798,11 +1799,15 @@ deliver:
|
|||
continue;
|
||||
case MSG_FRAGMENTER:
|
||||
l_ptr->stats.recv_fragments++;
|
||||
if (tipc_link_recv_fragment(&l_ptr->defragm_buf,
|
||||
&buf, &msg)) {
|
||||
ret = tipc_link_recv_fragment(
|
||||
&l_ptr->defragm_buf,
|
||||
&buf, &msg);
|
||||
if (ret == 1) {
|
||||
l_ptr->stats.recv_fragmented++;
|
||||
goto deliver;
|
||||
}
|
||||
if (ret == -1)
|
||||
l_ptr->next_in_no--;
|
||||
break;
|
||||
case CHANGEOVER_PROTOCOL:
|
||||
type = msg_type(msg);
|
||||
|
|
@ -1853,17 +1858,16 @@ cont:
|
|||
}
|
||||
|
||||
/*
|
||||
* link_defer_buf(): Sort a received out-of-sequence packet
|
||||
* into the deferred reception queue.
|
||||
* Returns the increase of the queue length,i.e. 0 or 1
|
||||
* tipc_link_defer_pkt - Add out-of-sequence message to deferred reception queue
|
||||
*
|
||||
* Returns increase in queue length (i.e. 0 or 1)
|
||||
*/
|
||||
|
||||
u32 tipc_link_defer_pkt(struct sk_buff **head,
|
||||
struct sk_buff **tail,
|
||||
u32 tipc_link_defer_pkt(struct sk_buff **head, struct sk_buff **tail,
|
||||
struct sk_buff *buf)
|
||||
{
|
||||
struct sk_buff *prev = NULL;
|
||||
struct sk_buff *crs = *head;
|
||||
struct sk_buff *queue_buf;
|
||||
struct sk_buff **prev;
|
||||
u32 seq_no = buf_seqno(buf);
|
||||
|
||||
buf->next = NULL;
|
||||
|
|
@ -1881,31 +1885,30 @@ u32 tipc_link_defer_pkt(struct sk_buff **head,
|
|||
return 1;
|
||||
}
|
||||
|
||||
/* Scan through queue and sort it in */
|
||||
do {
|
||||
struct tipc_msg *msg = buf_msg(crs);
|
||||
/* Locate insertion point in queue, then insert; discard if duplicate */
|
||||
prev = head;
|
||||
queue_buf = *head;
|
||||
for (;;) {
|
||||
u32 curr_seqno = buf_seqno(queue_buf);
|
||||
|
||||
if (less(seq_no, msg_seqno(msg))) {
|
||||
buf->next = crs;
|
||||
if (prev)
|
||||
prev->next = buf;
|
||||
else
|
||||
*head = buf;
|
||||
return 1;
|
||||
if (seq_no == curr_seqno) {
|
||||
buf_discard(buf);
|
||||
return 0;
|
||||
}
|
||||
if (seq_no == msg_seqno(msg))
|
||||
|
||||
if (less(seq_no, curr_seqno))
|
||||
break;
|
||||
prev = crs;
|
||||
crs = crs->next;
|
||||
} while (crs);
|
||||
|
||||
/* Message is a duplicate of an existing message */
|
||||
prev = &queue_buf->next;
|
||||
queue_buf = queue_buf->next;
|
||||
}
|
||||
|
||||
buf_discard(buf);
|
||||
return 0;
|
||||
buf->next = queue_buf;
|
||||
*prev = buf;
|
||||
return 1;
|
||||
}
|
||||
|
||||
/**
|
||||
/*
|
||||
* link_handle_out_of_seq_msg - handle arrival of out-of-sequence packet
|
||||
*/
|
||||
|
||||
|
|
@ -1956,6 +1959,13 @@ void tipc_link_send_proto_msg(struct tipc_link *l_ptr, u32 msg_typ,
|
|||
u32 msg_size = sizeof(l_ptr->proto_msg);
|
||||
int r_flag;
|
||||
|
||||
/* Discard any previous message that was deferred due to congestion */
|
||||
|
||||
if (l_ptr->proto_msg_queue) {
|
||||
buf_discard(l_ptr->proto_msg_queue);
|
||||
l_ptr->proto_msg_queue = NULL;
|
||||
}
|
||||
|
||||
if (link_blocked(l_ptr))
|
||||
return;
|
||||
|
||||
|
|
@ -1964,9 +1974,11 @@ void tipc_link_send_proto_msg(struct tipc_link *l_ptr, u32 msg_typ,
|
|||
if ((l_ptr->owner->block_setup) && (msg_typ != RESET_MSG))
|
||||
return;
|
||||
|
||||
/* Create protocol message with "out-of-sequence" sequence number */
|
||||
|
||||
msg_set_type(msg, msg_typ);
|
||||
msg_set_net_plane(msg, l_ptr->b_ptr->net_plane);
|
||||
msg_set_bcast_ack(msg, mod(l_ptr->owner->bclink.last_in));
|
||||
msg_set_bcast_ack(msg, l_ptr->owner->bclink.last_in);
|
||||
msg_set_last_bcast(msg, tipc_bclink_get_last_sent());
|
||||
|
||||
if (msg_typ == STATE_MSG) {
|
||||
|
|
@ -2020,44 +2032,36 @@ void tipc_link_send_proto_msg(struct tipc_link *l_ptr, u32 msg_typ,
|
|||
r_flag = (l_ptr->owner->working_links > tipc_link_is_up(l_ptr));
|
||||
msg_set_redundant_link(msg, r_flag);
|
||||
msg_set_linkprio(msg, l_ptr->priority);
|
||||
|
||||
/* Ensure sequence number will not fit : */
|
||||
msg_set_size(msg, msg_size);
|
||||
|
||||
msg_set_seqno(msg, mod(l_ptr->next_out_no + (0xffff/2)));
|
||||
|
||||
/* Congestion? */
|
||||
|
||||
if (tipc_bearer_congested(l_ptr->b_ptr, l_ptr)) {
|
||||
if (!l_ptr->proto_msg_queue) {
|
||||
l_ptr->proto_msg_queue =
|
||||
tipc_buf_acquire(sizeof(l_ptr->proto_msg));
|
||||
}
|
||||
buf = l_ptr->proto_msg_queue;
|
||||
if (!buf)
|
||||
return;
|
||||
skb_copy_to_linear_data(buf, msg, sizeof(l_ptr->proto_msg));
|
||||
return;
|
||||
}
|
||||
|
||||
/* Message can be sent */
|
||||
|
||||
buf = tipc_buf_acquire(msg_size);
|
||||
if (!buf)
|
||||
return;
|
||||
|
||||
skb_copy_to_linear_data(buf, msg, sizeof(l_ptr->proto_msg));
|
||||
msg_set_size(buf_msg(buf), msg_size);
|
||||
|
||||
if (tipc_bearer_send(l_ptr->b_ptr, buf, &l_ptr->media_addr)) {
|
||||
l_ptr->unacked_window = 0;
|
||||
buf_discard(buf);
|
||||
/* Defer message if bearer is already congested */
|
||||
|
||||
if (tipc_bearer_congested(l_ptr->b_ptr, l_ptr)) {
|
||||
l_ptr->proto_msg_queue = buf;
|
||||
return;
|
||||
}
|
||||
|
||||
/* New congestion */
|
||||
tipc_bearer_schedule(l_ptr->b_ptr, l_ptr);
|
||||
l_ptr->proto_msg_queue = buf;
|
||||
l_ptr->stats.bearer_congs++;
|
||||
/* Defer message if attempting to send results in bearer congestion */
|
||||
|
||||
if (!tipc_bearer_send(l_ptr->b_ptr, buf, &l_ptr->media_addr)) {
|
||||
tipc_bearer_schedule(l_ptr->b_ptr, l_ptr);
|
||||
l_ptr->proto_msg_queue = buf;
|
||||
l_ptr->stats.bearer_congs++;
|
||||
return;
|
||||
}
|
||||
|
||||
/* Discard message if it was sent successfully */
|
||||
|
||||
l_ptr->unacked_window = 0;
|
||||
buf_discard(buf);
|
||||
}
|
||||
|
||||
/*
|
||||
|
|
@ -2105,6 +2109,8 @@ static void link_recv_proto_msg(struct tipc_link *l_ptr, struct sk_buff *buf)
|
|||
l_ptr->owner->block_setup = WAIT_NODE_DOWN;
|
||||
}
|
||||
|
||||
link_state_event(l_ptr, RESET_MSG);
|
||||
|
||||
/* fall thru' */
|
||||
case ACTIVATE_MSG:
|
||||
/* Update link settings according other endpoint's values */
|
||||
|
|
@ -2127,16 +2133,22 @@ static void link_recv_proto_msg(struct tipc_link *l_ptr, struct sk_buff *buf)
|
|||
} else {
|
||||
l_ptr->max_pkt = l_ptr->max_pkt_target;
|
||||
}
|
||||
l_ptr->owner->bclink.supported = (max_pkt_info != 0);
|
||||
l_ptr->owner->bclink.supportable = (max_pkt_info != 0);
|
||||
|
||||
link_state_event(l_ptr, msg_type(msg));
|
||||
/* Synchronize broadcast link info, if not done previously */
|
||||
|
||||
if (!tipc_node_is_up(l_ptr->owner)) {
|
||||
l_ptr->owner->bclink.last_sent =
|
||||
l_ptr->owner->bclink.last_in =
|
||||
msg_last_bcast(msg);
|
||||
l_ptr->owner->bclink.oos_state = 0;
|
||||
}
|
||||
|
||||
l_ptr->peer_session = msg_session(msg);
|
||||
l_ptr->peer_bearer_id = msg_bearer_id(msg);
|
||||
|
||||
/* Synchronize broadcast sequence numbers */
|
||||
if (!tipc_node_redundant_links(l_ptr->owner))
|
||||
l_ptr->owner->bclink.last_in = mod(msg_last_bcast(msg));
|
||||
if (msg_type(msg) == ACTIVATE_MSG)
|
||||
link_state_event(l_ptr, ACTIVATE_MSG);
|
||||
break;
|
||||
case STATE_MSG:
|
||||
|
||||
|
|
@ -2177,7 +2189,9 @@ static void link_recv_proto_msg(struct tipc_link *l_ptr, struct sk_buff *buf)
|
|||
|
||||
/* Protocol message before retransmits, reduce loss risk */
|
||||
|
||||
tipc_bclink_check_gap(l_ptr->owner, msg_last_bcast(msg));
|
||||
if (l_ptr->owner->bclink.supported)
|
||||
tipc_bclink_update_link_state(l_ptr->owner,
|
||||
msg_last_bcast(msg));
|
||||
|
||||
if (rec_gap || (msg_probe(msg))) {
|
||||
tipc_link_send_proto_msg(l_ptr, STATE_MSG,
|
||||
|
|
@ -2623,7 +2637,9 @@ int tipc_link_recv_fragment(struct sk_buff **pending, struct sk_buff **fb,
|
|||
set_fragm_size(pbuf, fragm_sz);
|
||||
set_expected_frags(pbuf, exp_fragm_cnt - 1);
|
||||
} else {
|
||||
warn("Link unable to reassemble fragmented message\n");
|
||||
dbg("Link unable to reassemble fragmented message\n");
|
||||
buf_discard(fbuf);
|
||||
return -1;
|
||||
}
|
||||
buf_discard(fbuf);
|
||||
return 0;
|
||||
|
|
|
|||
|
|
@ -239,9 +239,6 @@ exit:
|
|||
*
|
||||
* Invoked for each publication issued by a newly failed node.
|
||||
* Removes publication structure from name table & deletes it.
|
||||
* In rare cases the link may have come back up again when this
|
||||
* function is called, and we have two items representing the same
|
||||
* publication. Nudge this item's key to distinguish it from the other.
|
||||
*/
|
||||
|
||||
static void named_purge_publ(struct publication *publ)
|
||||
|
|
@ -249,7 +246,6 @@ static void named_purge_publ(struct publication *publ)
|
|||
struct publication *p;
|
||||
|
||||
write_lock_bh(&tipc_nametbl_lock);
|
||||
publ->key += 1222345;
|
||||
p = tipc_nametbl_remove_publ(publ->type, publ->lower,
|
||||
publ->node, publ->ref, publ->key);
|
||||
if (p)
|
||||
|
|
|
|||
|
|
@ -49,9 +49,8 @@ LIST_HEAD(tipc_node_list);
|
|||
static u32 tipc_num_nodes;
|
||||
|
||||
static atomic_t tipc_num_links = ATOMIC_INIT(0);
|
||||
u32 tipc_own_tag;
|
||||
|
||||
/**
|
||||
/*
|
||||
* tipc_node_find - locate specified node object, if it exists
|
||||
*/
|
||||
|
||||
|
|
@ -306,10 +305,9 @@ static void node_established_contact(struct tipc_node *n_ptr)
|
|||
/* Syncronize broadcast acks */
|
||||
n_ptr->bclink.acked = tipc_bclink_get_last_sent();
|
||||
|
||||
if (n_ptr->bclink.supported) {
|
||||
if (n_ptr->bclink.supportable) {
|
||||
tipc_bclink_add_node(n_ptr->addr);
|
||||
if (n_ptr->addr < tipc_own_addr)
|
||||
tipc_own_tag++;
|
||||
n_ptr->bclink.supported = 1;
|
||||
}
|
||||
}
|
||||
|
||||
|
|
@ -338,12 +336,12 @@ static void node_lost_contact(struct tipc_node *n_ptr)
|
|||
/* Flush broadcast link info associated with lost node */
|
||||
|
||||
if (n_ptr->bclink.supported) {
|
||||
n_ptr->bclink.gap_after = n_ptr->bclink.gap_to = 0;
|
||||
while (n_ptr->bclink.deferred_head) {
|
||||
struct sk_buff *buf = n_ptr->bclink.deferred_head;
|
||||
n_ptr->bclink.deferred_head = buf->next;
|
||||
buf_discard(buf);
|
||||
}
|
||||
n_ptr->bclink.deferred_size = 0;
|
||||
|
||||
if (n_ptr->bclink.defragm) {
|
||||
buf_discard(n_ptr->bclink.defragm);
|
||||
|
|
@ -352,8 +350,6 @@ static void node_lost_contact(struct tipc_node *n_ptr)
|
|||
|
||||
tipc_bclink_remove_node(n_ptr->addr);
|
||||
tipc_bclink_acknowledge(n_ptr, INVALID_LINK_SEQ);
|
||||
if (n_ptr->addr < tipc_own_addr)
|
||||
tipc_own_tag--;
|
||||
|
||||
n_ptr->bclink.supported = 0;
|
||||
}
|
||||
|
|
@ -449,7 +445,7 @@ struct sk_buff *tipc_node_get_links(const void *req_tlv_area, int req_tlv_space)
|
|||
|
||||
read_lock_bh(&tipc_net_lock);
|
||||
|
||||
/* Get space for all unicast links + multicast link */
|
||||
/* Get space for all unicast links + broadcast link */
|
||||
|
||||
payload_size = TLV_SPACE(sizeof(link_info)) *
|
||||
(atomic_read(&tipc_num_links) + 1);
|
||||
|
|
|
|||
|
|
@ -62,12 +62,13 @@
|
|||
* @link_cnt: number of links to node
|
||||
* @permit_changeover: non-zero if node has redundant links to this system
|
||||
* @bclink: broadcast-related info
|
||||
* @supportable: non-zero if node supports TIPC b'cast link capability
|
||||
* @supported: non-zero if node supports TIPC b'cast capability
|
||||
* @acked: sequence # of last outbound b'cast message acknowledged by node
|
||||
* @last_in: sequence # of last in-sequence b'cast message received from node
|
||||
* @gap_after: sequence # of last message not requiring a NAK request
|
||||
* @gap_to: sequence # of last message requiring a NAK request
|
||||
* @nack_sync: counter that determines when NAK requests should be sent
|
||||
* @last_sent: sequence # of last b'cast message sent by node
|
||||
* @oos_state: state tracker for handling OOS b'cast messages
|
||||
* @deferred_size: number of OOS b'cast messages in deferred queue
|
||||
* @deferred_head: oldest OOS b'cast message received from node
|
||||
* @deferred_tail: newest OOS b'cast message received from node
|
||||
* @defragm: list of partially reassembled b'cast message fragments from node
|
||||
|
|
@ -86,12 +87,13 @@ struct tipc_node {
|
|||
int block_setup;
|
||||
int permit_changeover;
|
||||
struct {
|
||||
int supported;
|
||||
u8 supportable;
|
||||
u8 supported;
|
||||
u32 acked;
|
||||
u32 last_in;
|
||||
u32 gap_after;
|
||||
u32 gap_to;
|
||||
u32 nack_sync;
|
||||
u32 last_sent;
|
||||
u32 oos_state;
|
||||
u32 deferred_size;
|
||||
struct sk_buff *deferred_head;
|
||||
struct sk_buff *deferred_tail;
|
||||
struct sk_buff *defragm;
|
||||
|
|
@ -112,8 +114,6 @@ static inline unsigned int tipc_hashfn(u32 addr)
|
|||
return addr & (NODE_HTABLE_SIZE - 1);
|
||||
}
|
||||
|
||||
extern u32 tipc_own_tag;
|
||||
|
||||
struct tipc_node *tipc_node_find(u32 addr);
|
||||
struct tipc_node *tipc_node_create(u32 addr);
|
||||
void tipc_node_delete(struct tipc_node *n_ptr);
|
||||
|
|
|
|||
|
|
@ -400,15 +400,16 @@ int tipc_reject_msg(struct sk_buff *buf, u32 err)
|
|||
|
||||
/* send self-abort message when rejecting on a connected port */
|
||||
if (msg_connected(msg)) {
|
||||
struct sk_buff *abuf = NULL;
|
||||
struct tipc_port *p_ptr = tipc_port_lock(msg_destport(msg));
|
||||
|
||||
if (p_ptr) {
|
||||
struct sk_buff *abuf = NULL;
|
||||
|
||||
if (p_ptr->connected)
|
||||
abuf = port_build_self_abort_msg(p_ptr, err);
|
||||
tipc_port_unlock(p_ptr);
|
||||
tipc_net_route_msg(abuf);
|
||||
}
|
||||
tipc_net_route_msg(abuf);
|
||||
}
|
||||
|
||||
/* send returned message & dispose of rejected message */
|
||||
|
|
|
|||
Загрузка…
Ссылка в новой задаче